US2690241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic fluid brake and support therefor
Assignee: American Steel Foundries
•
Filing: 1949-07-22
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Granted: 1954-09-28
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Expires: 1969-07-22
Abstract
No abstract record available.
Inventors
- 👤 Bachman Fred Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:55
CPC Classifications
F; F16; F16D; F16D57/00; F16D57/002; B; B60; B60T; B60T13/00; B60T13/74; B61; B61H; B61H1/00; F16D2121/00; F16D2121/18; F16D2121/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE485591A
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US1243529A
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US1968583A
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US2174399A
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US2174395A
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US2308890A
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US2382870A
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US2467356A
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US2575360A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |